51 results about "Pupillary response" patented technology

A solution for evaluating the pupillary responses of a patient is disclosed. The solution includes exposing one eye of a patient to flashes having varying patterns and concurrently recording the pupillary responses of both eyes of the patient to the flash. At least some of the patterns can be configured to stimulate / not stimulate the macula region of the patient's eye. The solution also can include reducing one or more non-visual stimuli experienced by the patient while the pupillary responses are being induced and recorded.

A computationally efficient and robust approach for monitoring the instantaneous pupil response as a correlate to significant cognitive response to relevant stimuli derives data samples d(n) of the pupil diameter (area), v(n) of pupil velocity and a(n) of pupil acceleration from the pupillary response and segments the data samples into a sequence of time-shifted windows. A feature extractor extracts a plurality of spatio-temporal pupil features from the data samples from the response and baseline periods in each window. A classifier trained to detect patterns of the extracted spatio-temporal pupil features for relevant stimuli generates an output indicative of the occurrence of absence of a significant cognitive response in the subject to a relevant stimulus.

A pupilometer having a pupil irregularity or non-uniformity detection capability. The pupilometer may comprise an imaging sensor for generating signals representative of a pupil of an eye, a data processor; and a program executable by the data processor for enabling the data processor to process signals received from the imaging sensor and to thereby identify one or more regions of non-uniformity within an image of a perimeter of the pupil. The pupilometer may incorporate several innovative calibration and thresholding routines and may provide the basis for an innovative medical diagnostics system, when coupled to a network containing a suitable medical database and data processing hardware.

The invention administers an objective clinical test to an eye that measures the visual sensitivity of the superior retina and the inferior retina, by alternately presenting a stimulus pair comprising a shaped superior light stimulus and a shaped inferior light stimulus that are horizontal mirror images of one another and have shapes encompassing visual field defects. The shaped superior and inferior light stimuli stimulate pupillary responses whose amplitudes are measured. A cycle-averaged pupillary response balance and a luminance ratio are computed for each presentation of a stimulus pair. A stimulus pair response curve is computed by fitting cycle-averaged pupillary response balances to a sigmoid function of the luminance ratios. A balanced luminance ratio at which the cycle-averaged pupillary response balance is equal to about zero is computed from the sigmoid function. The balanced luminance ratio is indicative of the presence and location of retinal nerve damage.

The present system for analyzing eye responses accurately and automatically tracks the size, location, and movement of a subject's pupil(s) in response to a predetermined test protocol. These eye responses include both ocularmotor and pupillary responses to illumination and target tracking for either eye or both eyes simultaneously. The series of digital image frames of a subject's eyes, taken during the execution of a predetermined stimulus protocol, are automatically processed to determine pupil location, size, and responsiveness to changes in illumination.

A method of screening a pupil of a subject to determine whether the pupil reflex resembles a canonical pupil reflex is disclosed. The method comprises the steps of stimulating the pupil with a stimulus source, such as a pupilometer and determining whether one of various pupillary response conditions is met.

A portable, non-invasive binocular scanning apparatus for rapid assessment of neurological function in cases of potential trauma, disease, and / or exposure to chemical treat agents. The scanning apparatus may utilize a combination of light sources for the measurement and assessment of pupillary response, retinal imagery, and / or other ophthalmologic biomarkers. The scanning apparatus can detect and assess a wide range of neurological and physiological conditions by obtaining pertinent measurements from the retina and pupil in real time.

A method is provided of systematically evaluating and treating dynamic autonomic dysregulation in a subject. The method includes having the subject sequentially assume a plurality of distinct postures that may include, for example, walking, standing, sitting or supine. In each posture of the subject, the subject is subjected to sensory stimulation while measuring at least one autonomic physiological response of the subject. The autonomic physiological response may include, for example, oxygen saturation, heart rate, pupillary response, blood pressure, sweat production, pseudomotor activity or respiration. The physiological responses in each of the distinct postures are evaluated to identify a posture wherein the subject exhibits a least amount of dysfunction.

Solutions for evaluating the pupillary responses of a patient are disclosed. An illustrative method includes alternately exposing a first eye and a second eye of the patient to light stimulation in successive intervals, the light stimulation provided by at least one light source controlled by at least one computing device; concurrently capturing, with at least one image device controlled by the at least one computing device, image data of the first eye and the second eye during the exposing; and using the at least one computing device to perform the following: determine a center point of the first eye within the image data of the first eye and a center point of the second eye within the image data of the second eye; obtain image data of a first half of the first eye having an edge defined by a line of pixels intersecting the determined center point of the first eye; obtain image data of a second half of the second eye, the second half of the second eye opposing the first half of the first eye and having an edge defined by a line of pixels intersecting the determined center point of the second eye; create a composite image including the image data of the first half of the first eye and the image data of the second half of the second eye; and provide the composite image for evaluation.

A method of screening for retinal disease including directing a first light at a first portion of the retina, directing a second light at a second portion of the retina, measuring a first pupillary response of the eye as a result of the first light and a second pupillary response as a result of the second light, and generating an indication of a severity level of the retinal disease using the first pupillary response and the second pupillary response. Also, an apparatus that implements this method including a light source for directing a first light at a first retinal portion and a second light at a second retinal portion, a pupil measuring device for measuring the pupillary response of the eye as a result of the first light and second light, a processor in electronic communication with the pupil measuring device, and a memory in electronic communication with the processor.